11.24: Two wave pulsesn ++u owbm 9z-:qu3 j/ktho/df travel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulso+ -k/m9hoftq/j zb3:nwu+dues will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the surfacevzl2dc8o um,+ 9ata 1vn 58ksj of a plastic block. Which pair of statements correctly describes the phase changes for the ruvvltkzs8 d2 cj1+om 95a8n,aeflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through the point labeledes wo).wl;sl lh80nom j t8)m( B in the diagram shown. The ray reaches a flat mirror placed at an 8j80l)tm(nw o.wmls shl) oe; angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever light is i payc l e(f/c*3*e/azjnvu(/4bv( apuncident on

  05.18: A student hold a hand mirror to observe theq p0 z(frf5h*n back of her head while standing in front of and looking into a wall mirr(n 0h*f p5zqfror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes direct )r i7x75em mzpny+zo+ion when it enters a new material. Which one of t+ oir)ey +7p57nxmzzmhe following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has siy0o;bv( z :p..dqgowavelength 400 nm in a transparent material. What is the z0y odbv.s: (q.;igpoindex of refraction of the material?

  98.04: As sound travels from s+iygdmvxo fj /1. 5; -nocpyt(teel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with / ak kbo( jmqhfj0:x7+a different index of refraction whichkf ao /m0b7jjq:kx (+h of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of singly s31pedieua.e1m5 x /e frequency travels from aips d1x5i. 3a/uemye1 er (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emi/(vjk yl4z)a)k o6 mpgtn af4h1l( -hjts a sound wave that travels toward the surface of)tv1hka (4 - fnk/yphoaj l j4z)(6mlg the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white*j d ueuo5 f14t*5ld ultgg+hy(c+4ed light strikes a rectangular glass block with an angledlclu+ jh4(dg5o5t +u4eyg* *duetf1 of incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P z0 3pui phwts 82ox(w.on a boundary as shown to the right. Which segment best represents theuw2w. x po0s8zph 3(ti refracted ray?

  98.17: Which diagram best represents what happens to a ray of light entering aiut2 3 shsi:e4ql+rji4r:4si4e+slqh3 ji 2rut from water? Air is at the top in all diagrams.

  94.11: The critical angle of a mat-b 21jtni)8yp od.buv erial is the angle of incidence for which the angle2ytd b- vo 1b8iunjp). of refraction is:

  95.12: The principle unxme7w0zk+iu75nz j dd)87 dmc derlying fiber optics is:

  98.36: The critical angle in a tr pf7ofyrys.,1 ansparent substance surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an index of refractifsg i*h,pux xs2)) 5jaon of n = 1.5 to material Y with an inu2sis ))j*5p,af xhxgdex of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece ob1o +adirh9ahjcg)j0 k:m *a+ f glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical ar1a ia9k++0bg:h mjoj*cdh )angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clear material. When the light makes us1o3+vlgm(9t tu )cy an angle oftcul1+(9 3g tmy uv)so incidence equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded in a material of w:ds)sv pa: p3index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of 3d: spwp:as)vthe laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to mediin w c)tzo4*5* w)uq, m9g(easwxy4mqum 2 to medium 3 as shown in the accompanying figure. What is true aboutiug4 5nq,m4 * q* to) )wa9sexz(ywcmw the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as shown iksy3 0jp5,3 w* fjsydsn the diagram. What may be concluded about the three indexes of refr,p3jk f y30s wdjs*s5yaction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passx, iefm w)8v9fs0uk +ying through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and +vm )sfewk8,x9 if uy0n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic q 1fz(ic1ro+5ni(y k(bropu(ae+* pb light ray traveling through three media.The syraci+b((z(kn1oyeub1 qr +i*(fpo p 5mbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traveling ign 3echvqp l)ro )t5:yd7s,d 0n glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangu42bx0 4 jkb eqgsqeoer0c;5 x*lar block of glass at an angle 0;45qxqo *bbxrs2 e0 gc4jekeof $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a 5jc *m disz c)k4wy73f1bd /ospiece of glass. Which one of the labeled arrows best indicates the path of the 1*md 4f7/ccbz3d ysj5)kiswolight ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glfe6njn5v.et .g2f 7 fnass as shown. The glass has an index of refraction of 2.00 and iteegf 725ff.6.tv n njn is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?